Portia de Rossi Channels Marilyn Monroe for Ellen DeGeneres' BirthdayEllen DeGeneres turned 53 on Wednesday and was caught off-guard when producers organized a party during 'The Ellen DeGeneres Show.' The star-studded affair, which included everyone from Pink and Julia Roberts to Colin Farrell and Jayden Smith, was full of surprises, but perhaps the highlight of the show was when DeGeneres' wife, Portia de Rossi, channeled Marilyn Monroe in a surprise birthday greeting.

De Rossi, wearing a white satin gown and platinum blond wig, does her best impression of Monroe singing 'Happy Birthday.' Something goes terribly wrong, however, when a wind machine "malfunctions" and literally blows de Rossi off her feet. Watch the clip. ►►